Physical World 1

The Theory of motion of material objects at low speeds is called

• Newtonian Mechanics
• Thermodynamics
• Dynamic Theory
• Newton ‘s theory of relativity

4. High speed moving particles are studied under which theory

• Newtonian Mechanics
• Thermodynamics
• Dynamic Theory
• Theory of relativity

The atomic , molecular and nuclear phenomena are the parts of ________ domain

• Macroscopic
• microscopic
• telescopic
• electroscopic

Charges are neither created nor destroyed but can be transferred from one body to another is law of conservation of

• Charges
• Forces
• Electromagnetic Induction
• angular momentum

All the events that we observe in nature can be explained and understood in terms of

• Few physical law
• experimental logic
• Chemical changes
• hypothetical thinking

Electron Microscope is based on the Principle of

• Optical fibre
• Wave nature of electron
• digital logic
• Newton second law

Reflection of ultrasonic waves is used in the technology of

• Lasers
• optical Fibre
• Sonar
• aeroplane

A Physical quantity is represented completely by

• Its magnitude only
• its unit only
• its magnitude as well as unit
• neither magnitude nor unit but its direction

Gaussian System of unit is also called as

• SI system
• MKS System
• FPS System
• CGS system

Which of following is a unit of length

• Micrometer
• Light year
• Nanometer
• All the above